of brooklyn



J. KRALUND.

GATE FORMER FOR CASTING APPARATUS. APPLICATION FILED JULY 9.1919.

1,321,457. Q Patented Nov 11,1919.

. 511 we wto'c '95 v til -Ho w 13 Q UNITED STATES PATENT. orrrofif JOHN KRALUND, OF BROOKLYN, NEW YORK, ASSIGNOR T DOEHLER DIE CASTIhTG I COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

GATE-FORMER FOR CASTING APPARATUS.

T 0 all whom it may concern:

Be it known that I, JOHN KRALUNmn citizen of the United States, residing in the borough of Brooklyn, in the city of New ing Apparatus, of which the following is a specification.

My invention relates to an improved constructlon of gate former for casting apparatus, and particularly die casting appara-" tus. My invention is particularly designed for use in connection with the casting apparatus disclosed in my Patent- No. 1,299,738, issued April 8, 1919, on die casting apparatus, although it is not limited strictly to coaction with such apparatus.

In the apparatus described in my said patent, molten metal is transferred from its containerto the die by means of a moving carrier or ladle, the mouth-piece of which moves into connection with an opening extending through a gate member. Conipressed air or the like'then forces the metal through this opening into a die which may besecured to or positioned adjacent to the gate member, A bushing ordinarily extends through the opening in the gate member, and

is provided with a tapered forward end with which the mouth piece of L he carrier device registers when the metal is to be de-.

livered to the die. The bushing referred to, or gate former, asv it is termed, has, in usual practice, to be frequently renewed, because,

of burning of the same by the molten metal which passestherethrough.

My invention overcomes this difiiculty by a construction embodying a jacket for a cooling medium, such as water, surrounding the tube through which the molten metal passes, together with means for circulating a cooling medium therethrough, so that the temperature of the inner 'tube will be prevented from becoming' 'excessively high, so that the necessity for renewing the bushings or gate formers will be largely obviated.-

In order that a clearer understanding of my invention may be had, attention ishereby directed to the accompanying drawings formingpart of this application and 'illustrating one embodiment of my invention. In the drawings, Figure 1 represent a vertical section through agate member provided Specification of Letters Patent.

.ber l is shown broken away.

Patented Nov. 11, 1919.

Application filed July 9, 1919. Serial No. 309,575.

Referring to the drawings, the gate mem- This gate member is provided with a horizontal opening therethrough within which is mounted an outer shell or tube 2. An inner shell or tube,3 is mounted within the outer shell 2. The outer tube 2 is provided with a portion '2 having an inner surface of greater diameter than the remaining portion 2 of the tube. The inner tube 3 'preferalt ly is mounted with a forced fit within the portion 2" of reduced diameter ofthe outer shell, an annular space 4: being provided between the outer surface of the inner shell and the inner surface of the portion 2 of the outer shell.

The outer tube 2 is PIOXlClP/(l with an enlarged head portion 5 which is adapted to engage against a face of the gate member '1. This head is preferably provided with shoulders 6 so that it may conveniently be manipulated by a wrench in adjusting the tube into position. Thehead 5 has an opening 'therethrough, as is indicated at 7, of the same diameter as that of the opening through the portion 2 of tube 2, so that the inner tube 3 will have a forced fit bearing within the head 5 and within the portion 2 of tube 2, at opposite ends of the annular space 4. The annular space is thus made water-tight, the tube 2 constituting a water jacket surrounding the inner tube or gate former 3.

The head 5 is preferably provided with a recess 8 in its face, of the same diameter as the shouldered portion 9 on the end of the inner tube 3, so that thisshoulder fits within the recess 8 with a forced fit, the shoulder acting .as a stop to preventithe inner tube 3 being driven too far into the tube 2.

-The inner end of tube 3 is preferably provided with a tapered seat 10, within the shouldered portion- 9 and communicating with the bore of the tube. This seat is adapted to receive the mouth piece 11 of a carrier device 12 which is adapted to carry molten metal from a melting pot or container into alinement with the gate former, after which compressed air or the like may be used to force the harge of molten metal through the tube 3 into. the die which may be secured to the opposite face of the gate member 1. in alineinent With the opening through tube Th details of cons tioir' of the metal. carrier device are not material to the present invention. suit able arrangeinent hoWeveig is described and claimed in my Patent No.1,299fl38 previously referred to.

The gate former or tube 3 is cooled by the circulation oi a suitable cooling" inediunn such as Water, through the annular space -1-. This circulation may be provided means of a pair of tubes 13 and 14- whit may be flexible hose or the like, one of th same serving for leading- Water into the space -1- and the other serving i'c'or returning the same therefrom. are screwed into suitable tapped openings and 16 extending into the head these "tapped openings being connected passages l7 and 18 With the annulz'ir space It will be evident that the tube or gate former 3 will be cooled to t consid 'able L 7 \.AL(./

extent by the clrculation of Water in the spaced, the heatimparted to the tube byw the molten metal passing; therethrougg'h being to a considerable extent carried away by the cooling iluid. llhe life of the gate former is, therefore, considerably extended. In adjusting the device it is only necessary to force the outer tube into place and to drive the inner tube into the outer tube until the shoulder 9 engages Within recess 8. The inner and outer tubes may readily be removed by driving the same out of the opening in gate member 1, in the op osite direction to that in which they Were torced into the opening in gate member 1.

The tubes 18 and l t at I claim is zof a gate memier having an opening therethrough, a jacket surroi'uiding said opening, and means for circulat through said jacket, the :torward end of said opening being adapted to receive the mouthpiece a molten metal carrier.

In casting apparatus, the combination oi. a gate member having an opening there through, a tube extem ing 'ougli said.

opening, a second tube surrolandingsaid first tube in said 0 Jennie so as to crowds in? A n f a coolin niediun'r in casting apparatus, the combination tions of reduced diameten an annular space being thereby provided between said inner tube and the portions of greater inner diameter-of said outer tube and connections for circulating a cooling medium through said space. 1

I This specification signed and witnessed this 26th day oi June, 1919.

' JOHN KRALUND. lVitnesses Josnrn Home,

WILLIAM R. Ansennc. 

